Author Topic: mechanical shutoff to replace 12v magnetic  (Read 5982 times)

April 04, 2012, 11:59:50 pm

billybobf

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    89 golf 1.8 digi, 1.6 na in pieces in the shop
mechanical shutoff to replace 12v magnetic
« on: April 04, 2012, 11:59:50 pm »
as title says, Ive I cant get one I might make one, but wondering if there is already one made? dont want to rely on the 12v system for much...

Reply #1April 05, 2012, 12:33:37 am

maxfax

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Re: mechanical shutoff to replace 12v magnetic
« Reply #1 on: April 05, 2012, 12:33:37 am »
If you could find a pump from an auto trans car, it would have a mech shutoff..

Another option would be to rig some sort of a cable operated idle stop.. Pull the stop cable and the idle setting drops too low for it to run (saw it on a cummins with a ve pump).. Then they just removed the plunger from the electric solenoid..

Reply #2April 05, 2012, 05:55:03 am

410

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Re: mechanical shutoff to replace 12v magnetic
« Reply #2 on: April 05, 2012, 05:55:03 am »
There is also a solenoid available for marine use that is opposite.  You have to apply power to shut the fuel off.  As far as reliability goes, these solenoids rarely fail.  If you're worried keep a spare one with you.
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Reply #3April 05, 2012, 01:11:22 pm

745 turbogreasel

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Re: mechanical shutoff to replace 12v magnetic
« Reply #3 on: April 05, 2012, 01:11:22 pm »
Add the emergency shutoff lever from an auto, keep the electric, but remove plunger if needed.

Reply #4April 05, 2012, 04:34:34 pm

billybobf

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Re: mechanical shutoff to replace 12v magnetic
« Reply #4 on: April 05, 2012, 04:34:34 pm »
OK, I guess I should explain that I was diagnosed with ADHD at a young age but was in advanced classes at the same time, I like to over process over think and over do everything.

I was thinking a generator that I could jump start (a gen that sits for a year isnt going to have a working battery anyways) put the battery back in my rig and have it stay running.

Or a very low weight and voltage eco car (even thought about no battery but that would be hard if it stalled anywhere (smaller battery and big lightweight CAP) (way over thought it there)

or, just a smaller battery and small alt to be economical. LED lights all around, anything that takes much power, then super tall gears

Reply #5April 05, 2012, 07:06:57 pm

bajacalal

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Re: mechanical shutoff to replace 12v magnetic
« Reply #5 on: April 05, 2012, 07:06:57 pm »
The thing is, if you lose the alternator, the solenoid would keep going on battery power for quite a long time. I drove from Stockton to San Diego once without a working alternator. It doesn't require much current. I think the solenoid would be one of the last critical systems to fail and you had better worry about things like the electric fan first. If you want something cable operated, I know a lot older diesels had them, I'm talking about stuff built before the late 70s. No idea how you would adapt that to your VE pump though.

Reply #6April 05, 2012, 07:20:56 pm

745 turbogreasel

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Re: mechanical shutoff to replace 12v magnetic
« Reply #6 on: April 05, 2012, 07:20:56 pm »
There is a spot in the side of the pump you knock out the plug, and put in the lever, if you don't already have one.

I bet the solenoid wold run 40+ hours on a drill battery.

Reply #7April 05, 2012, 08:15:24 pm

billybobf

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Re: mechanical shutoff to replace 12v magnetic
« Reply #7 on: April 05, 2012, 08:15:24 pm »
cool cool,

Reply #8April 07, 2012, 09:51:18 am

srgtlord

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Re: mechanical shutoff to replace 12v magnetic
« Reply #8 on: April 07, 2012, 09:51:18 am »
or you could pull the plunger out of the stop solenoid  and put a manual valve on the fuel pump feed line.

Reply #9April 07, 2012, 10:28:30 pm

oldpoopie

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Re: mechanical shutoff to replace 12v magnetic
« Reply #9 on: April 07, 2012, 10:28:30 pm »
or you could pull the plunger out of the stop solenoid  and put a manual valve on the fuel pump feed line.
I imagint this would starve injectors and airlock the system preventing restart.
1985 jetta TD. It was free, and it shows. Down and dirty engine refresh made it run fairly well.... No leaks, except water into the cabin!

2001 golf Tdi. Heavy built ALH, soon to have a PD Frankenstein motor.

Reply #10April 07, 2012, 10:33:16 pm

billybobf

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Re: mechanical shutoff to replace 12v magnetic
« Reply #10 on: April 07, 2012, 10:33:16 pm »
sounded to me like it could put a nasty bit of vacuum on the internals of the pump?

Reply #11April 08, 2012, 01:11:49 pm

8v-of-fury

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Re: mechanical shutoff to replace 12v magnetic
« Reply #11 on: April 08, 2012, 01:11:49 pm »
Yes I too would think that restricting either the Supply or the Drain lines would cause a bit of havoc inside the pump.

fwiw, the 12v system powering that 12v solenoid has worked on these pumps from AT LEAST 1975 all the way up until they changed to the PD engines and eliminated the IP. Not to mention most have lasted 1/4million miles or more.

What is your beef with the way this was designed?? lol

Reply #12April 08, 2012, 01:19:27 pm

R.O.R-2.0

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Re: mechanical shutoff to replace 12v magnetic
« Reply #12 on: April 08, 2012, 01:19:27 pm »
Heres my pump. i run both shut offs.. i have both mechanical, and electronic..

little red handle sticking off the side of the pump is the manual shut down.. my audi 5kTD has one too.

Peugeot, a few other manufacturers, and VW/AUDI AUTOMATIC TURBO DIESELS all came with mechanical fuel shut offs also..

« Last Edit: April 08, 2012, 01:21:01 pm by R.O.R-2.0 »
92 Jetta GLI - Black, 1.6D w/ GT2056V turbo..
86 GTI - 4 Door, Med Twilight Gray, Tow Machine..
86 Audi Coupe GT - Tornado Red, All Stock.. WRECKED.
89 Toyota 4Runner - Dark Grey Metallic, LIFTED!

Turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.

Reply #13April 08, 2012, 04:04:07 pm

billybobf

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Re: mechanical shutoff to replace 12v magnetic
« Reply #13 on: April 08, 2012, 04:04:07 pm »
guessing its an opposite of the governor mod/idle stop screw, allows the slip collar to not build ANY pressure at the rotor/fully off the hole?

Reply #14April 09, 2012, 10:28:07 pm

fatmobile

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Re: mechanical shutoff to replace 12v magnetic
« Reply #14 on: April 09, 2012, 10:28:07 pm »
So that's what that is. :o
 Then push it back and you can start again by engageing the starter?
 
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